A Flutter plugin to show incoming call in your Flutter app(Custom for Android/Callkit for iOS).

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• Show an incoming call

• Start an outgoing call

• Custom UI Android/Callkit for iOS

• Example using Pushkit/VoIP for iOS

  
  

1. Install Packages

• Run this command:

  flutter pub add flutter_callkit_incoming

  • Add pubspec.yaml:

        dependencies:
          flutter_callkit_incoming: any

    2. Configure Project
       • Android
         • AndroidManifest.xml

          <manifest...>
              ...
              <!--
                  Using for load image from internet
              -->
              <uses-permission android:name="android.permission.INTERNET"/>
         
            <application ...>
                <activity ...
                   android:name=".MainActivity"
                   android:launchMode="singleInstance">
                 ...
            ...
         
          </manifest>
         

         The following rule needs to be added in the proguard-rules.pro to avoid obfuscated keys.

          -keep class com.hiennv.flutter_callkit_incoming.** { *; }
         

• iOS
  • Info.plist

  <key>UIBackgroundModes</key>
  <array>
      <string>voip</string>
      <string>remote-notification</string>
      <string>processing</string> //you can add this if needed
  </array>
  

3. Usage

• Import

  import 'package:flutter_callkit_incoming/flutter_callkit_incoming.dart';

• Received an incoming call

    this._currentUuid = _uuid.v4();
    CallKitParams callKitParams = CallKitParams(
      id: _currentUuid,
      nameCaller: 'Hien Nguyen',
      appName: 'Callkit',
      avatar: 'https://i.pravatar.cc/100',
      handle: '0123456789',
      type: 0,
      textAccept: 'Accept',
      textDecline: 'Decline',
      missedCallNotification: NotificationParams(
          showNotification: true,
          isShowCallback: true,
          subtitle: 'Missed call',
          callbackText: 'Call back',
      ),
      duration: 30000,
      extra: <String, dynamic>{'userId': '1a2b3c4d'},
      headers: <String, dynamic>{'apiKey': 'Abc@123!', 'platform': 'flutter'},
      android: const AndroidParams(
          isCustomNotification: true,
          isShowLogo: false,
          ringtonePath: 'system_ringtone_default',
          backgroundColor: '#0955fa',
          backgroundUrl: 'https://i.pravatar.cc/500',
          actionColor: '#4CAF50',
          textColor: '#ffffff',
          incomingCallNotificationChannelName: "Incoming Call",
          missedCallNotificationChannelName: "Missed Call",
          isShowCallID: false
      ),
      ios: IOSParams(
        iconName: 'CallKitLogo',
        handleType: 'generic',
        supportsVideo: true,
        maximumCallGroups: 2,
        maximumCallsPerCallGroup: 1,
        audioSessionMode: 'default',
        audioSessionActive: true,
        audioSessionPreferredSampleRate: 44100.0,
        audioSessionPreferredIOBufferDuration: 0.005,
        supportsDTMF: true,
        supportsHolding: true,
        supportsGrouping: false,
        supportsUngrouping: false,
        ringtonePath: 'system_ringtone_default',
      ),
    );
    await FlutterCallkitIncoming.showCallkitIncoming(callKitParams);

  Note: Firebase Message: @pragma('vm:entry-point')
  https://github.com/firebase/flutterfire/blob/master/docs/cloud-messaging/receive.md#apple-platforms-and-android

• request permission for post Notification Android 13 For Android 13 , please requestNotificationPermission or requestPermission of firebase_messaging before showCallkitIncoming

    await FlutterCallkitIncoming.requestNotificationPermission({
      "rationaleMessagePermission": "Notification permission is required, to show notification.",
      "postNotificationMessageRequired": "Notification permission is required, Please allow notification permission from setting."
    });

• request permission for full intent Notification/full screen locked screen Android 14 For Android 14 , please requestFullIntentPermission

    await FlutterCallkitIncoming.requestFullIntentPermission();

• Show miss call notification

    this._currentUuid = _uuid.v4();
    CallKitParams params = CallKitParams(
      id: _currentUuid,
      nameCaller: 'Hien Nguyen',
      handle: '0123456789',
      type: 1,
      textMissedCall: 'Missed call',
      textCallback: 'Call back',
      extra: <String, dynamic>{'userId': '1a2b3c4d'},
    );
    await FlutterCallkitIncoming.showMissCallNotification(params);

• Hide notification call for Android

    CallKitParams params = CallKitParams(
      id: _currentUuid,
    );
   await FlutterCallkitIncoming.hideCallkitIncoming(params);
  

• Started an outgoing call

    this._currentUuid = _uuid.v4();
    CallKitParams params = CallKitParams(
      id: this._currentUuid,
      nameCaller: 'Hien Nguyen',
      handle: '0123456789',
      type: 1,
      extra: <String, dynamic>{'userId': '1a2b3c4d'},
      ios: IOSParams(handleType: 'generic')
    );
    await FlutterCallkitIncoming.startCall(params);

• Ended an incoming/outgoing call

    await FlutterCallkitIncoming.endCall(this._currentUuid);

• Ended all calls

    await FlutterCallkitIncoming.endAllCalls();

• Get active calls. iOS: return active calls from Callkit(only id), Android: only return last call

    await FlutterCallkitIncoming.activeCalls();

  Output

  [{"id": "8BAA2B26-47AD-42C1-9197-1D75F662DF78", ...}]

• Set status call connected (only for iOS - used to determine Incoming Call or Outgoing Call status in phone book)

    await FlutterCallkitIncoming.setCallConnected(this._currentUuid);
  

  After the call is ACCEPT or startCall please call this func. normally it should be called when webrtc/p2p.... is established.

• Get device push token VoIP. iOS: return deviceToken, Android: Empty

    await FlutterCallkitIncoming.getDevicePushTokenVoIP();

  Output

  <device token>
  
  //Example
  d6a77ca80c5f09f87f353cdd328ec8d7d34e92eb108d046c91906f27f54949cd
  

  Make sure using SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken) inside AppDelegate.swift (Example)

  func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, for type: PKPushType) {
      print(credentials.token)
      let deviceToken = credentials.token.map { String(format: "x", $0) }.joined()
      //Save deviceToken to your server
      SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken)
  }
  
  func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
      print("didInvalidatePushTokenFor")
      SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP("")
  }

• Listen events

    FlutterCallkitIncoming.onEvent.listen((CallEvent event) {
      switch (event!.event) {
        case Event.actionCallIncoming:
          // TODO: received an incoming call
          break;
        case Event.actionCallStart:
          // TODO: started an outgoing call
          // TODO: show screen calling in Flutter
          break;
        case Event.actionCallAccept:
          // TODO: accepted an incoming call
          // TODO: show screen calling in Flutter
          break;
        case Event.actionCallDecline:
          // TODO: declined an incoming call
          break;
        case Event.actionCallEnded:
          // TODO: ended an incoming/outgoing call
          break;
        case Event.actionCallTimeout:
          // TODO: missed an incoming call
          break;
        case Event.actionCallCallback:
          // TODO: only Android - click action `Call back` from missed call notification
          break;
        case Event.actionCallToggleHold:
          // TODO: only iOS
          break;
        case Event.actionCallToggleMute:
          // TODO: only iOS
          break;
        case Event.actionCallToggleDmtf:
          // TODO: only iOS
          break;
        case Event.actionCallToggleGroup:
          // TODO: only iOS
          break;
        case Event.actionCallToggleAudioSession:
          // TODO: only iOS
          break;
        case Event.actionDidUpdateDevicePushTokenVoip:
          // TODO: only iOS
          break;
        case Event.actionCallCustom:
          // TODO: for custom action
          break;
      }
    });

• Call from Native (iOS/Android)

    //Swift iOS
    var info = [String: Any?]()
    info["id"] = "44d915e1-5ff4-4bed-bf13-c423048ec97a"
    info["nameCaller"] = "Hien Nguyen"
    info["handle"] = "0123456789"
    info["type"] = 1
    //... set more data
    SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(flutter_callkit_incoming.Data(args: info), fromPushKit: true)
  
    //please make sure call `completion()` at the end of the pushRegistry(......, completion: @escaping () -> Void)
    // or `DispatchQueue.main.asyncAfter(deadline: .now()   1.5) { completion() }`
    // if you don't call completion() in pushRegistry(......, completion: @escaping () -> Void), there may be app crash by system when receiving voIP

      //Kotlin/Java Android
      FlutterCallkitIncomingPlugin.getInstance().showIncomingNotification(...)

  
  

    //OR
    let data = flutter_callkit_incoming.Data(id: "44d915e1-5ff4-4bed-bf13-c423048ec97a", nameCaller: "Hien Nguyen", handle: "0123456789", type: 0)
    data.nameCaller = "Johnny"
    data.extra = ["user": "abc@123", "platform": "ios"]
    //... set more data
    SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(data, fromPushKit: true)

  
  

    //Objective-C
    #if __has_include(<flutter_callkit_incoming/flutter_callkit_incoming-Swift.h>)
    #import <flutter_callkit_incoming/flutter_callkit_incoming-Swift.h>
    #else
    #import "flutter_callkit_incoming-Swift.h"
    #endif
  
    Data * data = [[Data alloc]initWithId:@"44d915e1-5ff4-4bed-bf13-c423048ec97a" nameCaller:@"Hien Nguyen" handle:@"0123456789" type:1];
    [data setNameCaller:@"Johnny"];
    [data setExtra:@{ @"userId" : @"HelloXXXX", @"key2" : @"value2"}];
    //... set more data
    [SwiftFlutterCallkitIncomingPlugin.sharedInstance showCallkitIncoming:data fromPushKit:YES];

  
  

    //send custom event from native
    SwiftFlutterCallkitIncomingPlugin.sharedInstance?.sendEventCustom(body: ["customKey": "customValue"])

      //Kotlin/Java Android
      FlutterCallkitIncomingPlugin.getInstance().sendEventCustom(body: Map<String, Any>)

  • 3.1 Call API when accept/decline/end/timeout

  //Appdelegate
  ...
  @UIApplicationMain
  @objc class AppDelegate: FlutterAppDelegate, PKPushRegistryDelegate, CallkitIncomingAppDelegate {
  ...
  
  override func application(
      _ application: UIApplication,
      didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
      GeneratedPluginRegistrant.register(with: self)
      
      //Setup VOIP
      let mainQueue = DispatchQueue.main
      let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)
      voipRegistry.delegate = self
      voipRegistry.desiredPushTypes = [PKPushType.voIP]
  
      //Use if using WebRTC
      //RTCAudioSession.sharedInstance().useManualAudio = true
      //RTCAudioSession.sharedInstance().isAudioEnabled = false
      
      return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
  
  
  // Func Call api for Accept
  func onAccept(_ call: Call, _ action: CXAnswerCallAction) {
      let json = ["action": "ACCEPT", "data": call.data.toJSON()] as [String: Any]
      print("LOG: onAccept")
      self.performRequest(parameters: json) { result in
          switch result {
          case .success(let data):
              print("Received data: \(data)")
              //Make sure call action.fulfill() when you are done(connected WebRTC - Start counting seconds)
              action.fulfill()
  
          case .failure(let error):
              print("Error: \(error.localizedDescription)")
          }
      }
  }
  
  // Func Call API for Decline
  func onDecline(_ call: Call, _ action: CXEndCallAction) {
      let json = ["action": "DECLINE", "data": call.data.toJSON()] as [String: Any]
      print("LOG: onDecline")
      self.performRequest(parameters: json) { result in
          switch result {
          case .success(let data):
              print("Received data: \(data)")
              //Make sure call action.fulfill() when you are done
              action.fulfill()
  
          case .failure(let error):
              print("Error: \(error.localizedDescription)")
          }
      }
  }
  
  // Func Call API for End
  func onEnd(_ call: Call, _ action: CXEndCallAction) {
      let json = ["action": "END", "data": call.data.toJSON()] as [String: Any]
      print("LOG: onEnd")
      self.performRequest(parameters: json) { result in
          switch result {
          case .success(let data):
              print("Received data: \(data)")
              //Make sure call action.fulfill() when you are done
              action.fulfill()
  
          case .failure(let error):
              print("Error: \(error.localizedDescription)")
          }
      }
  }
  
  func onTimeOut(_ call: Call) {
      let json = ["action": "TIMEOUT", "data": call.data.toJSON()] as [String: Any]
      print("LOG: onTimeOut")
      self.performRequest(parameters: json) { result in
          switch result {
          case .success(let data):
              print("Received data: \(data)")
  
          case .failure(let error):
              print("Error: \(error.localizedDescription)")
          }
      }
  }
  
  func didActivateAudioSession(_ audioSession: AVAudioSession) {
      //Use if using WebRTC
      //RTCAudioSession.sharedInstance().audioSessionDidActivate(audioSession)
      //RTCAudioSession.sharedInstance().isAudioEnabled = true
  }
  
  func didDeactivateAudioSession(_ audioSession: AVAudioSession) {
      //Use if using WebRTC
      //RTCAudioSession.sharedInstance().audioSessionDidDeactivate(audioSession)
      //RTCAudioSession.sharedInstance().isAudioEnabled = false
  }
  ...
  
  

  Please check full: Example

4. Properties

   Prop	Description	Default
   id	UUID identifier for each call. UUID should be unique for every call and when the call is ended, the same UUID for that call to be used. suggest using uuid. ACCEPT ONLY UUID	Required
   nameCaller	Caller's name.	None
   appName	App's name. using for display inside Callkit(iOS).	App Name, Deprecated for iOS > 14, default using App name
   avatar	Avatar's URL used for display for Android. /android/src/main/res/drawable-xxxhdpi/ic_default_avatar.png	None
   handle	Phone number/Email/Any.	None
   type	0 - Audio Call, 1 - Video Call	0
   duration	Incoming call/Outgoing call display time (second). If the time is over, the call will be missed.	30000
   textAccept	Text Accept used in Android	Accept
   textDecline	Text Decline used in Android	Decline
   extra	Any data added to the event when received.	{}
   headers	Any data for custom header avatar/background image.	{}
   missedCallNotification	Android data needed to customize Miss Call Notification.	Below
   android	Android data needed to customize UI.	Below
   ios	iOS data needed.	Below

   
   

• Missed Call Notification

  Prop	Description	Default
  subtitle	Text Missed Call used in Android (show in miss call notification)	Missed Call
  callbackText	Text Call back used in Android (show in miss call notification)	Call back
  showNotification	Show missed call notification when timeout	true
  isShowCallback	Show callback action from miss call notification.	true

• Android

  Prop	Description	Default
  isCustomNotification	Using custom notifications.	false
  isCustomSmallExNotification	Using custom notification small on some devices clipped out in android.	false
  isShowLogo	Show logo app inside full screen. /android/src/main/res/drawable-xxxhdpi/ic_logo.png	false
  ringtonePath	File name ringtone. put file into /android/app/src/main/res/raw/ringtone_default.pm3	system_ringtone_default using ringtone default of the phone
  backgroundColor	Incoming call screen background color.	#0955fa
  backgroundUrl	Using image background for Incoming call screen. example: http://... https://... or "assets/abc.png"	None
  actionColor	Color used in button/text on notification.	#4CAF50
  textColor	Color used for the text in full screen notification.	#ffffff
  incomingCallNotificationChannelName	Notification channel name of incoming call.	Incoming call
  missedCallNotificationChannelName	Notification channel name of missed call.	Missed call
  isShowCallID	Show call id app inside full screen/notification.	false
  isShowFullLockedScreen	Show full screen on Locked Screen(please make sure call requestFullIntentPermission for android 14 ).	true

  
  

• iOS

  Prop	Description	Default
  iconName	App's Icon. using for display inside Callkit(iOS)	CallKitLogo using from Images.xcassets/CallKitLogo
  handleType	Type handle call generic, number, email	generic
  supportsVideo		true
  maximumCallGroups		2
  maximumCallsPerCallGroup		1
  audioSessionMode		None, gameChat, measurement, moviePlayback, spokenAudio, videoChat, videoRecording, voiceChat, voicePrompt
  audioSessionActive		true
  audioSessionPreferredSampleRate		44100.0
  audioSessionPreferredIOBufferDuration		0.005
  supportsDTMF		true
  supportsHolding		true
  supportsGrouping		true
  supportsUngrouping		true
  ringtonePath	Add file to root project xcode /ios/Runner/Ringtone.caf and Copy Bundle Resources(Build Phases)	Ringtone.caf system_ringtone_default using ringtone default of the phone

5. Source code

   please checkout repo github
   https://github.com/hiennguyen92/flutter_callkit_incoming
   

   • https://github.com/hiennguyen92/flutter_callkit_incoming
   • Example

6. Pushkit - Received VoIP and Wake app from Terminated State (only for IOS)

• Please check PUSHKIT.md setup Pushkit for IOS

7. Todo

• Run background

• Simplify the setup process

  
  

1. Demo Illustration:
2. Image

iOS(Lockscreen)	iOS(full screen)	iOS(Alert)
Android(Lockscreen) - Audio	Android(Alert) - Audio	Android(Lockscreen) - Video
Android(Alert) - Video	isCustomNotification: false